Door-spring



limite STATES JOHN A. MOHR, OF MANCHESTER, IOWA.

DOOR-SPRING.

SPECIFICATION forming part of Letters Patent No. 236,689, dated January18, 1881.

Application iiled September 20, 1880. (No model.)

To all whom t may concern:

Be it known that I, JOHN A. MOHR,of Manchester, in the county ofDelaware and State ot' Iowa, have invented an Improvement inDoor-Swings' and I hereby declare the following to be a full, clear, andexact description ot' the same, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon.

rlhis invention consists in the combination of a plate-spring ofpeculiar form with eertain bearing ears or iiaps, and with certainsecuring-pins, by means ot' which a simple spring is obtained, which canbe produced at a "ery low cost.

In the drawings, Figure l represents an isometric view ot' myimprovedspring applied to a door, the latter being represented in its closedposition; Fig. 2, a similar view with the door in its open position, andFigs. 3 and 4 side and end elevations of the spring detached.

To enable others skilled in the art to make my improved sprin g, I willproceed to describe fully the construction ot' the saine.

A, Figs. l and 2, represents the jainb ot the door, and a the dooritself.

B represents a spring, consisting of a plate ot sheet-steel wider at thecentral portion than the ends, which is bent into U-shapeform, as shownin Fig. 4, and is set in that position and properly tempered to give itthe requisite elasticity.

I) b, Figs. 3 and 4, represent eyes formed in the ends of the plate byproperly bending the same, and b', Fig. 3, a central recess between theeyes.

O O represent bearing ears or iiaps, each ot' which is provided with aproper screw-hole, by means of which the sameis properly screwed to thejalnb or door, and with a projection, o, having an eye, o', as shown,which projection is adapted to extend into the recess b', as shown inFig. 3.

D, Fig. 4, represents a securing-pin, which such points that the spring,when in its normal position, will act to keep the door closed.

The operation is substantially as follows: By the ordinary opening ot'the door the end of the spring upon the door is drawn away from thatupon the jamb against the resistance ot' the spring. When, consequently,the door is released, the same is closed by the necessary reaction. Whenthe door is opened wide, as shown in Fig. 2, the tendency of the spring,it will be observed, is to keep it open.

Some ot the advantages ofthe described construction are as follows: Byconstructing the spring-plate in the form shownthat is, with the widestpart in the center-the material is disposed in the best manner-thatis,the greater part et' the same is located at the point ot' greateststrain.

The construction of' the spring, as a whole, is very simple, and it canbe produced at very low cost.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

rIhe door-spring described, consisting of the plate-spring B, having theeyes b formed integral therewith, the bearing ears or iiaps O, havingthe eye-projection o, and the securingpins D, uniting the flaps andplate together, arranged and attached in the manner set forth.

This specification signed and witnessed this 16th day of September,1880.

JOHN A. MOHR.

Witnesses:

CHAs. E. BRoNsON, F. E. CORNISH, W. A. Ron.

